Quick Recipe Version (TL;DR)
Quick Ingredients
- 12 oz (340 g) short pasta (penne, rotini, or shells)
- 8 oz (225 g) bacon, chopped
- 3 cups (about 14 oz/400 g) cooked chicken, shredded or diced
- 3 tbsp unsalted butter
- 3 tbsp all-purpose flour
- 2 cups (480 ml) whole milk
- 1/2 cup (120 ml) heavy cream or half-and-half
- 4 oz (115 g) cream cheese, softened and cubed
- 1 packet (1 oz/28 g, about 3 tbsp) dry ranch seasoning mix
- 2 cups (8 oz/225 g) shredded sharp cheddar cheese, divided
- 1/2 cup (45 g) grated Parmesan cheese
- 4 scallions (green onions), thinly sliced
- 2 garlic cloves, minced
- Salt, black pepper, and optional red pepper flakes
- Cooking spray or butter for greasing the dish
Do This
- 1. Preheat oven to 375°F (190°C). Grease a 9×13-inch (23×33 cm) baking dish.
- 2. Cook pasta in salted water until just al dente; drain and set aside.
- 3. Cook chopped bacon until crispy; remove bacon, reserving 2 tbsp drippings in the pan.
- 4. Add butter to drippings, sauté garlic and scallion whites, whisk in flour, then milk and cream to form a smooth sauce.
- 5. Whisk in cream cheese, ranch mix, 1½ cups cheddar, Parmesan, salt, and pepper until melted and creamy.
- 6. In a large bowl, toss pasta with chicken, most of the bacon, scallion greens, and the sauce; spread into baking dish and top with remaining cheddar and bacon.
- 7. Bake 18–22 minutes until bubbly and lightly golden. Rest 5 minutes before serving, garnished with extra scallions.
Why You’ll Love This Recipe
- Creamy ranch sauce, crispy bacon, tender chicken, and melted cheddar all in one cozy casserole.
- Uses everyday ingredients and simple techniques that are totally doable on a weeknight.
- Bakes in a single dish for a complete meal that feeds a crowd or guarantees leftovers.
- Easy to customize with extra veggies, different cheeses, or a spicier twist.
Grocery List
- Produce: Scallions (green onions), garlic.
- Dairy: Unsalted butter, whole milk, heavy cream or half-and-half, cream cheese, sharp cheddar cheese, Parmesan cheese.
- Pantry: Short pasta, dry ranch seasoning mix, all-purpose flour, salt, black pepper, red pepper flakes (optional), cooking spray or oil, cooked chicken (rotisserie or leftover), bacon.
Full Ingredients
Pasta and Chicken
- 12 oz (340 g) short pasta, such as penne, rotini, or medium shells
- 3 cups (about 14 oz/400 g) cooked chicken, shredded or diced (rotisserie works great)
Bacon and Aromatics
- 8 oz (225 g) bacon, cut into small pieces
- 4 scallions (green onions), thinly sliced, whites and greens separated
- 2 garlic cloves, minced
Creamy Ranch Cheese Sauce
- 3 tbsp unsalted butter
- 3 tbsp all-purpose flour
- 2 cups (480 ml) whole milk, at room temperature if possible
- 1/2 cup (120 ml) heavy cream or half-and-half
- 4 oz (115 g) cream cheese, softened and cut into cubes
- 1 packet (1 oz/28 g, about 3 tbsp) dry ranch seasoning mix
- 2 cups (8 oz/225 g) shredded sharp cheddar cheese, divided (1½ cups for sauce, 1/2 cup for topping)
- 1/2 cup (45 g) grated Parmesan cheese
- 1/2 tsp kosher salt, plus more to taste
- 1/2 tsp freshly ground black pepper
- Pinch red pepper flakes (optional, for gentle heat)
For the Dish
- Cooking spray, or 1 tsp softened butter, for greasing the baking dish
Step-by-Step Instructions
Step 1: Preheat the oven and prep the baking dish
Set your oven to 375°F (190°C). Give it time to fully preheat while you prepare everything else; this helps the casserole cook evenly. Lightly grease a 9×13-inch (23×33 cm) baking dish with cooking spray or a thin layer of butter. This prevents sticking and makes cleanup easier.
Gather and measure all ingredients. Slice the scallions, separating the white and green parts into two piles. Cube the cream cheese so it melts more smoothly later. If your chicken is not yet cooked, you can quickly pan-sear small pieces in a bit of oil with salt and pepper until just cooked through, then set aside.
Step 2: Cook the pasta until just al dente
Bring a large pot of well-salted water to a rolling boil. Add the 12 oz (340 g) of pasta and cook according to package directions, but subtract 1–2 minutes from the listed time so it is just al dente. The pasta will continue cooking in the oven, and slightly undercooking it now prevents it from becoming mushy later.
When the pasta reaches al dente, reserve about 1/2 cup (120 ml) of the starchy cooking water, then drain the pasta well. Transfer the drained pasta back into the pot or a large mixing bowl to keep it from sticking together. Toss lightly with a drizzle of oil if you like.
Step 3: Cook the bacon and aromatics
While the pasta cooks, place the chopped bacon in a large, deep skillet or saucepan over medium heat. Cook, stirring occasionally, until the bacon is deeply golden and crisp, 7–10 minutes. Use a slotted spoon to transfer the bacon to a paper towel–lined plate. Leave about 2 tbsp of bacon drippings in the pan and carefully pour off the rest.
Add the butter to the pan with the hot drippings. Once melted and foamy, stir in the scallion whites and cook for 1–2 minutes until slightly softened and fragrant. Add the minced garlic and cook for 30 seconds, just until fragrant, taking care not to let it brown.
Step 4: Build the creamy ranch cheese sauce
Sprinkle the flour evenly over the butter and aromatics. Stir constantly for 1–2 minutes to form a smooth paste (roux); this cooks off the raw flour taste. Gradually whisk in the milk, a splash at a time at first, whisking well after each addition to avoid lumps. Once about half the milk is in and the mixture is smooth, whisk in the remaining milk and the heavy cream or half-and-half.
Turn the heat to medium-low and simmer, whisking frequently, until the sauce thickens enough to coat the back of a spoon, about 4–6 minutes. Add the cubed cream cheese and whisk until completely melted and smooth. Whisk in the ranch seasoning mix, 1½ cups of the shredded cheddar, all of the Parmesan, salt, black pepper, and optional red pepper flakes. Stir until the cheeses are melted and the sauce is velvety. Taste and adjust seasoning as needed.
Step 5: Combine pasta, chicken, bacon, and sauce
In the large pot or mixing bowl with the drained pasta, add the cooked chicken, about three-quarters of the crispy bacon, and most of the scallion greens (reserve a small handful for garnish). Pour the hot creamy ranch cheese sauce over the top.
Use a large spoon or spatula to gently toss everything together until the pasta is evenly coated and the chicken and bacon are distributed throughout. If the mixture seems very thick or dry, stir in a splash or two of the reserved pasta cooking water to loosen it slightly. You want it creamy but not soupy.
Step 6: Assemble and bake the casserole
Transfer the pasta mixture into the prepared 9×13-inch (23×33 cm) baking dish, spreading it into an even layer. Sprinkle the remaining 1/2 cup shredded cheddar evenly over the top, followed by the remaining bacon pieces.
Place the dish on the center rack of the preheated oven and bake for 18–22 minutes, or until the casserole is bubbling around the edges and the cheese on top is fully melted and starting to turn lightly golden brown. If you like a deeper golden top, you can broil it for 1–2 minutes at the end, watching closely so it does not burn.
Step 7: Rest, garnish, and serve
When the casserole is done, remove it from the oven and let it rest for about 5–10 minutes. This brief resting time helps the sauce thicken slightly, so the portions hold together better when you scoop them.
Sprinkle the reserved sliced scallion greens over the top for fresh color and a mild onion bite. Serve big, cozy scoops straight from the baking dish, making sure each portion gets a good mix of pasta, chicken, crispy bacon, and cheesy ranch sauce.
Pro Tips
- Undercook the pasta slightly: Aim for just al dente in the pot. The pasta softens further in the oven and soaks up some of the creamy sauce.
- Use room-temperature dairy when possible: Milk and cream cheese that are not ice-cold blend into the sauce more smoothly and reduce the chance of lumps.
- Salt in layers: Your bacon, ranch mix, and cheese all contain salt. Taste the sauce before adding extra salt and adjust gently.
- Do not skimp on the rest time: Letting the casserole sit for a few minutes after baking prevents runny portions and helps the flavors meld.
- Use a big mixing bowl: Tossing everything together in a generous bowl keeps the pasta from breaking and makes it easier to coat evenly with sauce.
Variations
- Veggie-loaded ranch bake: Stir in 1–2 cups of lightly cooked broccoli florets, peas, or diced bell peppers when you mix the pasta and sauce. This adds color, texture, and some freshness.
- Spicy ranch bacon pasta: Add extra red pepper flakes, a diced jalapeño (sautéed with the scallions), or drizzle buffalo sauce over each portion before serving.
- Extra-cheesy version: Swap some of the cheddar for smoked gouda or Monterey Jack, and add an extra 1/2 cup of cheese on top for a richer, more indulgent finish.
Storage & Make-Ahead
Allow the casserole to cool to room temperature, then cover tightly with foil or transfer leftovers to airtight containers. Refrigerate for up to 3–4 days. Reheat individual portions in the microwave until hot, or warm the whole dish, covered with foil, in a 350°F (175°C) oven for 20–25 minutes, adding a splash of milk if it seems dry.
For make-ahead, you can assemble the casserole up to the baking step, cover tightly, and refrigerate for up to 24 hours. When ready to bake, let it sit at room temperature for 20–30 minutes, then bake at 375°F (190°C), adding 5–10 extra minutes to the baking time, until heated through and bubbly. This dish also freezes well: wrap tightly and freeze for up to 2 months. Thaw overnight in the refrigerator before baking.
Nutrition (per serving)
Approximate values for 1 of 6 servings: about 780 calories, 43 g protein, 50 g fat, 40 g carbohydrates, 2 g fiber, and 1,000–1,200 mg sodium. Actual values will vary based on brands of ingredients used and exact portion sizes.
